Democratic Sen. Michael Bennet meets Republican Ken Buck Thursday in Pueblo for their third debate. The meeting comes as political allies on both sides ramp up attacks about past jobs.

A Democratic-leaning group started airing ads this week attacking Buck for a reprimand he received about a decade ago while working as a federal prosecutor. And a group allied with the GOP has an ad blasting Bennet for his oversight of a pension fund at Denver Public Schools, where Bennet was superintendent.

Both attacks were used against Buck and Bennet in their primary contests, but so far the two haven't brought up previous jobs in debates.

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